31228131751 has 2 divisors, whose sum is σ = 31228131752. Its totient is φ = 31228131750.

The previous prime is 31228131731. The next prime is 31228131763. The reversal of 31228131751 is 15713182213.

It is a strong prime.

It is an emirp because it is prime and its reverse (15713182213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31228131751 - 2⁵ = 31228131719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31228131731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15614065875 + 15614065876.

It is an arithmetic number, because the mean of its divisors is an integer number (15614065876).

Almost surely, 2^31228131751 is an apocalyptic number.

31228131751 is a deficient number, since it is larger than the sum of its proper divisors (1).

31228131751 is an equidigital number, since it uses as much as digits as its factorization.

31228131751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The spelling of 31228131751 in words is "thirty-one billion, two hundred twenty-eight million, one hundred thirty-one thousand, seven hundred fifty-one".